Multimodal Deep Learning for Lymph Node Metastasis Prediction and Physician Performance Assessment in T1 Gastric Cancer

This study is testing an AI system that uses multiple types of data (including scans, lab results, and tissue samples) to predict whether early-stage stomach cancer (T1 gastric cancer) has spread to nearby lymph nodes, which is critical for deciding whether surgery or a less invasive procedure is needed. **You may be eligible if...** - You are 18 years or older - You have confirmed early-stage stomach cancer (T1a or T1b) based on endoscopy and imaging - You have had stomach cancer confirmed by biopsy (gastric adenocarcinoma) - You are scheduled to undergo surgery (radical gastrectomy with lymph node removal) - Pre-operative data including CT scans and pathology slides are available **You may NOT be eligible if...** - You have a history of other cancers - Your cancer is more advanced than T1 stage - You lack the necessary pre-operative data for the study Talk to your doctor to see if this trial is right for you.